Polymer electrolyte membrane, method for manufacturing same, and membrane electrode assembly comprising same
a polymer electrolyte and membrane technology, applied in the manufacture of final products, cell components, electrochemical generators, etc., can solve the problems of low stability to radicals, limited application range of conventional polymer electrolyte membranes, and difficulty in exhibiting normal high performance in certain temperature and relative humidity environments. , to achieve the effect of reducing hydrogen permeability, excellent durability and ionic conductivity
Active Publication Date: 2022-04-12
KOLON IND INC
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- Description
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- Application Information
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Benefits of technology
The present disclosure describes a polymer electrolyte membrane that is very durable, can allow ions to move through it easily, and reduces the amount of hydrogen that can pass through it.
Problems solved by technology
Conventional polymer electrolyte membranes have difficulty exhibiting normal high performance under certain temperature and relative humidity environments, particularly under high-temperature and low-humidity conditions.
For this reason, a polymer electrolyte fuel cell, to which a conventional polymer electrolyte membrane is applied, has a limited range of application.
A polymer electrolyte membrane using a fluorine-based polymer material, which is generally used in fuel cells for transportation, has a disadvantage of low stability to radicals, that is, low chemical stability, due to the weak resistance to radicals generated during operation.
In addition, a polymer electrolyte membrane has high proton conductivity due to wide proton-transporting passage, but has a disadvantage of high hydrogen permeability.
Method used
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production example 1
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production example 1-1
[0230]1) Preparation of Hydrophobic Repeating Units
[0231]As shown in Reaction Scheme 3 below, bisphenol A was reacted with 1,3-bis(4-fluorobenzoyl)benzene at 160 to 180° C. for 30 hours using a co-solvent of DMAc / toluene in the presence of potassium carbonate, and the resulting reaction solution was washed with purified water and then hot-air dried. At this time, the Carothers equation was used to control the degree of polymerization of the oligomer.
[0232]
[0233]2) Preparation of Hydrophilic Repeating Units
[0234]As shown in Reaction Scheme 4 below, 4,4′-(9-fluorenyliene)diphenol was reacted with bis(4-fluorophenyl)sulfone at 160 to 180° C. for 30 hours using a co-solvent of DMAc / toluene in the presence of potassium carbonate, and the resulting reaction solution was washed with purified water and then hot-air dried. At this time, the Carothers equation was used to control the degree of polymerization of the oligomer.
[0235]
[0236]3) Preparation of Polymer
[0237]The prepared hydrophobic r...
production example 1-2
[0240]An ion conductor was produced in the same manner as in Production Example 1-1, except that the polymer was prepared in Production Example 1-1, such that the molar ratio of hydrophilic repeating unit:hydrophobic repeating unit was 1:2.5.
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Abstract
A polymer electrolyte membrane, a method for manufacturing the same, and a membrane electrode assembly containing the polymer electrolyte membrane are disclosed. The polymer electrolyte membrane includes: a fluorine-based support containing a plurality of pores due to polymer microfibrillar structures; a hybrid porous support placed on one side or both surfaces of the fluorine-based support and comprising nanowebs obtained by integrating nanofibers into a nonwoven fabric containing a plurality of pores; and ion conductors with which the pores of the porous support are filled. The polymer electrolyte membrane can reduce hydrogen permeability while being excellent in both durability and ion conductivity.
Description
CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is a National Stage of International Application No. PCT / KR2018 / 015025 filed Nov. 30, 2018, claiming priority based on Korean Patent Application No. 10-2017-0163453 filed Nov. 30, 2017 and 10-2018-0150117 filed Nov. 28, 2018.TECHNICAL FIELD[0002]The present disclosure relates to a polymer electrolyte membrane, a method of producing the same and a membrane-electrode assembly including the same. More particularly, the present disclosure relates to a polymer electrolyte membrane that has excellent durability and ionic conductivity and is capable of reducing hydrogen permeability, a method of producing the same, and a membrane-electrode assembly including the same.BACKGROUND ART[0003]A fuel cell is a cell having electric-power-generating system for directly converting chemical reaction energy derived from an oxidation / reduction reaction between oxygen and hydrogen contained in a hydrocarbon-based material such as methanol, et...
Claims
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IPC IPC(8): H01M8/1044H01M8/1006H01M8/1039H01M8/106H01M8/1062H01M8/1058H01M8/1041H01M8/1067
CPCH01M8/1044H01M8/1006H01M8/106H01M8/1039H01M8/1041H01M8/1058H01M8/1062H01M8/1067Y02P70/50Y02E60/50H01M8/1004H01M8/1053H01M8/1007H01M2008/1095H01M2300/0082H01M2300/0094H01M8/1025H01M8/1069
Inventor LEE, DONG-HOONKIM, NA-YOUNGLEE, EUN-SUPARK, JUNG-HWA
Owner KOLON IND INC